21112010021212 has 12 divisors (see below), whose sum is σ = 40304746404216. Its totient is φ = 9596368191440.

The previous prime is 21112010021147. The next prime is 21112010021237. The reversal of 21112010021212 is 21212001021112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239909204743 + ... + 239909204830.

It is an arithmetic number, because the mean of its divisors is an integer number (3358728867018).

Almost surely, 2^{21112010021212} is an apocalyptic number.

21112010021212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21112010021212 is a deficient number, since it is larger than the sum of its proper divisors (19192736383004).

21112010021212 is a wasteful number, since it uses less digits than its factorization.

21112010021212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479818409588 (or 479818409586 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21112010021212 its reverse (21212001021112), we get a palindrome (42324011042324).

The spelling of 21112010021212 in words is "twenty-one trillion, one hundred twelve billion, ten million, twenty-one thousand, two hundred twelve".