1021200701 has 2 divisors, whose sum is σ = 1021200702. Its totient is φ = 1021200700.

The previous prime is 1021200683. The next prime is 1021200731. The reversal of 1021200701 is 1070021201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 871725625 + 149475076 = 29525^2 + 12226^2 .

It is an emirp because it is prime and its reverse (1070021201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021200701 - 2⁶ = 1021200637 is a prime.

It is a super-3 number, since 3×1021200701³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021200731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510600350 + 510600351.

It is an arithmetic number, because the mean of its divisors is an integer number (510600351).

Almost surely, 2^1021200701 is an apocalyptic number.

It is an amenable number.

1021200701 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021200701 is an equidigital number, since it uses as much as digits as its factorization.

1021200701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 14.

The square root of 1021200701 is about 31956.2310199435. The cubic root of 1021200701 is about 1007.0175392809.

Adding to 1021200701 its reverse (1070021201), we get a palindrome (2091221902).

The spelling of 1021200701 in words is "one billion, twenty-one million, two hundred thousand, seven hundred one".