1202057021 has 16 divisors (see below), whose sum is σ = 1383575040. Its totient is φ = 1032847920.

The previous prime is 1202056997. The next prime is 1202057041. The reversal of 1202057021 is 1207502021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202057021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1202056984 and 1202057002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202057041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86096 + ... + 99078.

It is an arithmetic number, because the mean of its divisors is an integer number (86473440).

Almost surely, 2^1202057021 is an apocalyptic number.

1202057021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1202057021 is a deficient number, since it is larger than the sum of its proper divisors (181518019).

1202057021 is a wasteful number, since it uses less digits than its factorization.

1202057021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13456.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 1202057021 is about 34670.6939792096. The cubic root of 1202057021 is about 1063.2654200612.

Adding to 1202057021 its reverse (1207502021), we get a palindrome (2409559042).

The spelling of 1202057021 in words is "one billion, two hundred two million, fifty-seven thousand, twenty-one".