20120210111021 has 16 divisors (see below), whose sum is σ = 20624908993920. Its totient is φ = 19617212482560.

The previous prime is 20120210110993. The next prime is 20120210111059. The reversal of 20120210111021 is 12011101202102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20120210111021 is a prime.

It is a super-2 number, since 2×20120210111021² (a number of 27 digits) contains 22 as substring.

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 = 20120210110987 and 20120210111005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20120210111921) 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, 58281365 + ... + 58625573.

It is an arithmetic number, because the mean of its divisors is an integer number (1289056812120).

Almost surely, 2^{20120210111021} is an apocalyptic number.

It is an amenable number.

20120210111021 is a deficient number, since it is larger than the sum of its proper divisors (504698882899).

20120210111021 is a wasteful number, since it uses less digits than its factorization.

20120210111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346676.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20120210111021 its reverse (12011101202102), we get a palindrome (32131311313123).

The spelling of 20120210111021 in words is "twenty trillion, one hundred twenty billion, two hundred ten million, one hundred eleven thousand, twenty-one".