1200202122021 has 32 divisors (see below), whose sum is σ = 1879876926720. Its totient is φ = 666934754304.

The previous prime is 1200202122013. The next prime is 1200202122029. The reversal of 1200202122021 is 1202212020021.

It is an interprime number because it is at equal distance from previous prime (1200202122013) and next prime (1200202122029).

It is not a de Polignac number, because 1200202122021 - 2³ = 1200202122013 is a prime.

It is a super-2 number, since 2×1200202122021² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200202122029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4645686 + ... + 4897223.

It is an arithmetic number, because the mean of its divisors is an integer number (58746153960).

Almost surely, 2^{1200202122021} is an apocalyptic number.

It is an amenable number.

1200202122021 is a deficient number, since it is larger than the sum of its proper divisors (679674804699).

1200202122021 is a wasteful number, since it uses less digits than its factorization.

1200202122021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9543085.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1200202122021 its reverse (1202212020021), we get a palindrome (2402414142042).

The spelling of 1200202122021 in words is "one trillion, two hundred billion, two hundred two million, one hundred twenty-two thousand, twenty-one".