21121001011112 has 32 divisors (see below), whose sum is σ = 39904834749120. Its totient is φ = 10479714385920.

The previous prime is 21121001011073. The next prime is 21121001011129. The reversal of 21121001011112 is 21111010012112.

It is a super-2 number, since 2×21121001011112² (a number of 27 digits) contains 22 as substring.

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, 84655493 + ... + 84904619.

It is an arithmetic number, because the mean of its divisors is an integer number (1247026085910).

Almost surely, 2^{21121001011112} is an apocalyptic number.

It is an amenable number.

21121001011112 is a deficient number, since it is larger than the sum of its proper divisors (18783833738008).

21121001011112 is a wasteful number, since it uses less digits than its factorization.

21121001011112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330161 (or 330157 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21121001011112 its reverse (21111010012112), we get a palindrome (42232011023224).

The spelling of 21121001011112 in words is "twenty-one trillion, one hundred twenty-one billion, one million, eleven thousand, one hundred twelve".