212210121020 has 48 divisors (see below), whose sum is σ = 461064864960. Its totient is φ = 81946937856.

The previous prime is 212210121017. The next prime is 212210121031. The reversal of 212210121020 is 20121012212.

It is a junction number, because it is equal to n+sod(n) for n = 212210120986 and 212210121004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6167384 + ... + 6201696.

It is an arithmetic number, because the mean of its divisors is an integer number (9605518020).

Almost surely, 2^212210121020 is an apocalyptic number.

212210121020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212210121020 is an abundant number, since it is smaller than the sum of its proper divisors (248854743940).

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

212210121020 is a wasteful number, since it uses less digits than its factorization.

212210121020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45014 (or 45012 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212210121020 its reverse (20121012212), we get a palindrome (232331133232).

The spelling of 212210121020 in words is "two hundred twelve billion, two hundred ten million, one hundred twenty-one thousand, twenty".