1202112020021 has 16 divisors (see below), whose sum is σ = 1313075473920. Its totient is φ = 1091429575680.

The previous prime is 1202112019993. The next prime is 1202112020033. The reversal of 1202112020021 is 1200202112021.

It is a cyclic number.

It is not a de Polignac number, because 1202112020021 - 2²² = 1202107825717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202112019978 and 1202112020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202112020041) 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, 28106765 + ... + 28149501.

It is an arithmetic number, because the mean of its divisors is an integer number (82067217120).

Almost surely, 2^{1202112020021} is an apocalyptic number.

1202112020021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1202112020021 is a deficient number, since it is larger than the sum of its proper divisors (110963453899).

1202112020021 is a wasteful number, since it uses less digits than its factorization.

1202112020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45964.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1202112020021 its reverse (1200202112021), we get a palindrome (2402314132042).

The spelling of 1202112020021 in words is "one trillion, two hundred two billion, one hundred twelve million, twenty thousand, twenty-one".