202021121011020 has 24 divisors (see below), whose sum is σ = 565659138831024. Its totient is φ = 53872298936256.

The previous prime is 202021121011019. The next prime is 202021121011037. The reversal of 202021121011020 is 20110121120202.

It is a super-2 number, since 2×202021121011020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1683509341699 + ... + 1683509341818.

It is an arithmetic number, because the mean of its divisors is an integer number (23569130784626).

Almost surely, 2^{202021121011020} is an apocalyptic number.

202021121011020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202021121011020 is an abundant number, since it is smaller than the sum of its proper divisors (363638017820004).

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

202021121011020 is a wasteful number, since it uses less digits than its factorization.

202021121011020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3367018683529 (or 3367018683527 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 202021121011020 its reverse (20110121120202), we get a palindrome (222131242131222).

The spelling of 202021121011020 in words is "two hundred two trillion, twenty-one billion, one hundred twenty-one million, eleven thousand, twenty".