21211011011212 has 48 divisors (see below), whose sum is σ = 42213859881984. Its totient is φ = 9237976920000.

The previous prime is 21211011011209. The next prime is 21211011011263.

21211011011212 is nontrivially palindromic in base 10.

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, 76845378 + ... + 77120905.

It is an arithmetic number, because the mean of its divisors is an integer number (879455414208).

Almost surely, 2^{21211011011212} is an apocalyptic number.

21211011011212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21211011011212 is a deficient number, since it is larger than the sum of its proper divisors (21002848870772).

21211011011212 is a wasteful number, since it uses less digits than its factorization.

21211011011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153966430 (or 153966428 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

It can be divided in two parts, 2121101 and 1011212, that added together give a palindrome (3132313).

The spelling of 21211011011212 in words is "twenty-one trillion, two hundred eleven billion, eleven million, eleven thousand, two hundred twelve".