2021210221158 has 24 divisors (see below), whose sum is σ = 4379343169968. Its totient is φ = 673728377712.

The previous prime is 2021210221091. The next prime is 2021210221159. The reversal of 2021210221158 is 8511220121202.

It is a super-2 number, since 2×2021210221158² (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 (2021210221159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 891391 + ... + 2199317.

It is an arithmetic number, because the mean of its divisors is an integer number (182472632082).

Almost surely, 2^{2021210221158} is an apocalyptic number.

2021210221158 is an abundant number, since it is smaller than the sum of its proper divisors (2358132948810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2021210221158 is a wasteful number, since it uses less digits than its factorization.

2021210221158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393788 (or 1393785 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The spelling of 2021210221158 in words is "two trillion, twenty-one billion, two hundred ten million, two hundred twenty-one thousand, one hundred fifty-eight".