2021121101204 has 24 divisors (see below), whose sum is σ = 3659002019400. Its totient is φ = 975693398400.

The previous prime is 2021121101191. The next prime is 2021121101221. The reversal of 2021121101204 is 4021011211202.

It can be written as a sum of positive squares in 4 ways, for example, as 2726928400 + 2018394172804 = 52220^2 + 1420702^2 .

It is a super-2 number, since 2×2021121101204² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6494882 + ... + 6798950.

It is an arithmetic number, because the mean of its divisors is an integer number (152458417475).

Almost surely, 2^{2021121101204} is an apocalyptic number.

It is an amenable number.

2021121101204 is a deficient number, since it is larger than the sum of its proper divisors (1637880918196).

2021121101204 is a wasteful number, since it uses less digits than its factorization.

2021121101204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361403 (or 361401 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2021121101204 its reverse (4021011211202), we get a palindrome (6042132312406).

The spelling of 2021121101204 in words is "two trillion, twenty-one billion, one hundred twenty-one million, one hundred one thousand, two hundred four".