2120401123 has 2 divisors, whose sum is σ = 2120401124. Its totient is φ = 2120401122.

The previous prime is 2120401103. The next prime is 2120401139. The reversal of 2120401123 is 3211040212.

It is an a-pointer prime, because the next prime (2120401139) can be obtained adding 2120401123 to its sum of digits (16).

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2120401123 is a prime.

It is a super-2 number, since 2×2120401123² = 8992201844839322258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2120401097 and 2120401106.

It is not a weakly prime, because it can be changed into another prime (2120401103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060200561 + 1060200562.

It is an arithmetic number, because the mean of its divisors is an integer number (1060200562).

Almost surely, 2^2120401123 is an apocalyptic number.

2120401123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120401123 is an equidigital number, since it uses as much as digits as its factorization.

2120401123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2120401123 is about 46047.8134442885. The cubic root of 2120401123 is about 1284.7126738773.

Adding to 2120401123 its reverse (3211040212), we get a palindrome (5331441335).

The spelling of 2120401123 in words is "two billion, one hundred twenty million, four hundred one thousand, one hundred twenty-three".