1012201120021 has 64 divisors (see below), whose sum is σ = 1353072107520. Its totient is φ = 734907893760.

The previous prime is 1012201120019. The next prime is 1012201120031. The reversal of 1012201120021 is 1200211022101.

It is a cyclic number.

It is not a de Polignac number, because 1012201120021 - 2¹ = 1012201120019 is a prime.

It is a super-2 number, since 2×1012201120021² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1012201119983 and 1012201120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012201120031) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7818306 + ... + 7946716.

It is an arithmetic number, because the mean of its divisors is an integer number (21141751680).

Almost surely, 2^{1012201120021} is an apocalyptic number.

It is an amenable number.

1012201120021 is a deficient number, since it is larger than the sum of its proper divisors (340870987499).

1012201120021 is a wasteful number, since it uses less digits than its factorization.

1012201120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128594.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1012201120021 its reverse (1200211022101), we get a palindrome (2212412142122).

The spelling of 1012201120021 in words is "one trillion, twelve billion, two hundred one million, one hundred twenty thousand, twenty-one".