1421100020 has 24 divisors (see below), whose sum is σ = 2986174464. Its totient is φ = 568084896.

The previous prime is 1421100013. The next prime is 1421100049. The reversal of 1421100020 is 200011241.

It is a junction number, because it is equal to n+sod(n) for n = 1421099974 and 1421100010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11897 + ... + 54623.

It is an arithmetic number, because the mean of its divisors is an integer number (124423936).

Almost surely, 2^1421100020 is an apocalyptic number.

1421100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421100020 is an abundant number, since it is smaller than the sum of its proper divisors (1565074444).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421100020 is a wasteful number, since it uses less digits than its factorization.

1421100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44399 (or 44397 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1421100020 is about 37697.4802871492. The cubic root of 1421100020 is about 1124.2810273609.

Adding to 1421100020 its reverse (200011241), we get a palindrome (1621111261).

The spelling of 1421100020 in words is "one billion, four hundred twenty-one million, one hundred thousand, twenty".