211220121212012 has 48 divisors (see below), whose sum is σ = 405206739108864. Its totient is φ = 95540837304000.

The previous prime is 211220121211999. The next prime is 211220121212059. The reversal of 211220121212012 is 210212121022112.

It is a super-2 number, since 2×211220121212012² (a number of 29 digits) contains 22 as substring.

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, 20581562 + ... + 29086782.

It is an arithmetic number, because the mean of its divisors is an integer number (8441807064768).

Almost surely, 2^{211220121212012} is an apocalyptic number.

211220121212012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

211220121212012 is a deficient number, since it is larger than the sum of its proper divisors (193986617896852).

211220121212012 is a wasteful number, since it uses less digits than its factorization.

211220121212012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8507990 (or 8507988 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 211220121212012 its reverse (210212121022112), we get a palindrome (421432242234124).

The spelling of 211220121212012 in words is "two hundred eleven trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twelve thousand, twelve".