21012112212002 has 32 divisors (see below), whose sum is σ = 35148592559232. Its totient is φ = 9369743620864.

The previous prime is 21012112211999. The next prime is 21012112212029. The reversal of 21012112212002 is 20021221121012.

It is a Harshad number since it is a multiple of its sum of digits (17).

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, 125475713 + ... + 125643060.

It is an arithmetic number, because the mean of its divisors is an integer number (1098393517476).

Almost surely, 2^{21012112212002} is an apocalyptic number.

21012112212002 is a deficient number, since it is larger than the sum of its proper divisors (14136480347230).

21012112212002 is a wasteful number, since it uses less digits than its factorization.

21012112212002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251118922.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21012112212002 its reverse (20021221121012), we get a palindrome (41033333333014).

The spelling of 21012112212002 in words is "twenty-one trillion, twelve billion, one hundred twelve million, two hundred twelve thousand, two".