221010101010012 has 96 divisors (see below), whose sum is σ = 516946369766400. Its totient is φ = 73490858784000.

The previous prime is 221010101009993. The next prime is 221010101010031. The reversal of 221010101010012 is 210010101010122.

It is an interprime number because it is at equal distance from previous prime (221010101009993) and next prime (221010101010031).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 221010101010012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44585452638 + ... + 44585457594.

It is an arithmetic number, because the mean of its divisors is an integer number (5384858018400).

Almost surely, 2^{221010101010012} is an apocalyptic number.

It is an amenable number.

221010101010012 is an abundant number, since it is smaller than the sum of its proper divisors (295936268756388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221010101010012 is a wasteful number, since it uses less digits than its factorization.

221010101010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10171 (or 10169 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 221010101010012 its reverse (210010101010122), we get a palindrome (431020202020134).

The spelling of 221010101010012 in words is "two hundred twenty-one trillion, ten billion, one hundred one million, ten thousand, twelve".