1020012210021 has 16 divisors (see below), whose sum is σ = 1636109811200. Its totient is φ = 552187060848.

The previous prime is 1020012210017. The next prime is 1020012210083. The reversal of 1020012210021 is 1200122100201.

It is not a de Polignac number, because 1020012210021 - 2² = 1020012210017 is a prime.

It is a super-2 number, since 2×1020012210021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020012209979 and 1020012210006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020012210001) 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, 1278210391 + ... + 1278211188.

It is an arithmetic number, because the mean of its divisors is an integer number (102256863200).

Almost surely, 2^{1020012210021} is an apocalyptic number.

It is an amenable number.

1020012210021 is a deficient number, since it is larger than the sum of its proper divisors (616097601179).

1020012210021 is a wasteful number, since it uses less digits than its factorization.

1020012210021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556421608.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1020012210021 its reverse (1200122100201), we get a palindrome (2220134310222).

The spelling of 1020012210021 in words is "one trillion, twenty billion, twelve million, two hundred ten thousand, twenty-one".