212123011213220 has 24 divisors (see below), whose sum is σ = 445460465870784. Its totient is φ = 84848796423776.

The previous prime is 212123011213163. The next prime is 212123011213261. The reversal of 212123011213220 is 22312110321212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21223712 + ... + 29575191.

It is an arithmetic number, because the mean of its divisors is an integer number (18560852744616).

Almost surely, 2^{212123011213220} is an apocalyptic number.

212123011213220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212123011213220 is an abundant number, since it is smaller than the sum of its proper divisors (233337454657564).

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

212123011213220 is a wasteful number, since it uses less digits than its factorization.

212123011213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51007699 (or 51007697 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 212123011213220 its reverse (22312110321212), we get a palindrome (234435121534432).

The spelling of 212123011213220 in words is "two hundred twelve trillion, one hundred twenty-three billion, eleven million, two hundred thirteen thousand, two hundred twenty".