2021012212122 has 48 divisors (see below), whose sum is σ = 4395552490368. Its totient is φ = 671107288320.

The previous prime is 2021012212099. The next prime is 2021012212159. The reversal of 2021012212122 is 2212122101202.

It is a happy number.

2021012212122 is a `hidden beast` number, since 20 + 210 + 1 + 221 + 212 + 2 = 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 = 2021012212095 and 2021012212104.

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, 5027593 + ... + 5414675.

It is an arithmetic number, because the mean of its divisors is an integer number (91574010216).

Almost surely, 2^{2021012212122} is an apocalyptic number.

2021012212122 is an abundant number, since it is smaller than the sum of its proper divisors (2374540278246).

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

2021012212122 is a wasteful number, since it uses less digits than its factorization.

2021012212122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388195 (or 388192 counting only the distinct ones).

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

Adding to 2021012212122 its reverse (2212122101202), we get a palindrome (4233134313324).

The spelling of 2021012212122 in words is "two trillion, twenty-one billion, twelve million, two hundred twelve thousand, one hundred twenty-two".