212222031021 has 256 divisors, whose sum is σ = 442980679680. Its totient is φ = 96790256640.

The previous prime is 212222031013. The next prime is 212222031031. The reversal of 212222031021 is 120130222212.

It is not a de Polignac number, because 212222031021 - 2³ = 212222031013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212222030985 and 212222031003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222031031) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 122458471 + ... + 122460203.

It is an arithmetic number, because the mean of its divisors is an integer number (1730393280).

Almost surely, 2^212222031021 is an apocalyptic number.

212222031021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212222031021 is an abundant number, since it is smaller than the sum of its proper divisors (230758648659).

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

212222031021 is a wasteful number, since it uses less digits than its factorization.

212222031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993 (or 1987 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212222031021 its reverse (120130222212), we get a palindrome (332352253233).

The spelling of 212222031021 in words is "two hundred twelve billion, two hundred twenty-two million, thirty-one thousand, twenty-one".