20121231421102 has 32 divisors (see below), whose sum is σ = 36648325428480. Its totient is φ = 8093171842560.

The previous prime is 20121231421087. The next prime is 20121231421129. The reversal of 20121231421102 is 20112413212102.

It is a congruent number.

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, 353446899 + ... + 353503822.

It is an arithmetic number, because the mean of its divisors is an integer number (1145260169640).

Almost surely, 2^{20121231421102} is an apocalyptic number.

20121231421102 is a deficient number, since it is larger than the sum of its proper divisors (16527094007378).

20121231421102 is a wasteful number, since it uses less digits than its factorization.

20121231421102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706950856.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 20121231421102 its reverse (20112413212102), we get a palindrome (40233644633204).

The spelling of 20121231421102 in words is "twenty trillion, one hundred twenty-one billion, two hundred thirty-one million, four hundred twenty-one thousand, one hundred two".