212110021992 has 64 divisors (see below), whose sum is σ = 608928307200. Its totient is φ = 60892827840.

The previous prime is 212110021951. The next prime is 212110021997. The reversal of 212110021992 is 299120011212.

It is a super-2 number, since 2×212110021992² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (212110021997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21138328 + ... + 21148359.

It is an arithmetic number, because the mean of its divisors is an integer number (9514504800).

Almost surely, 2^212110021992 is an apocalyptic number.

212110021992 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212110021992 is an abundant number, since it is smaller than the sum of its proper divisors (396818285208).

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

212110021992 is a wasteful number, since it uses less digits than its factorization.

212110021992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42286726 (or 42286722 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The spelling of 212110021992 in words is "two hundred twelve billion, one hundred ten million, twenty-one thousand, nine hundred ninety-two".