20012121221022 has 48 divisors (see below), whose sum is σ = 49554077849952. Its totient is φ = 5717719627200.

The previous prime is 20012121220937. The next prime is 20012121221047. The reversal of 20012121221022 is 22012212121002.

It is a happy number.

20012121221022 is a `hidden beast` number, since 200 + 1 + 21 + 212 + 210 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20012121220986 and 20012121221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40705272 + ... + 41193972.

It is an arithmetic number, because the mean of its divisors is an integer number (1032376621874).

Almost surely, 2^{20012121221022} is an apocalyptic number.

20012121221022 is an abundant number, since it is smaller than the sum of its proper divisors (29541956628930).

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

20012121221022 is a wasteful number, since it uses less digits than its factorization.

20012121221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813713 (or 813710 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20012121221022 its reverse (22012212121002), we get a palindrome (42024333342024).

The spelling of 20012121221022 in words is "twenty trillion, twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty-two".