21012220010012 has 96 divisors (see below), whose sum is σ = 47839882051584. Its totient is φ = 7830348926400.

The previous prime is 21012220010003. The next prime is 21012220010021. The reversal of 21012220010012 is 21001002221012.

It is an interprime number because it is at equal distance from previous prime (21012220010003) and next prime (21012220010021).

It is a Harshad number since it is a multiple of its sum of digits (14).

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, 323217503 + ... + 323282505.

It is an arithmetic number, because the mean of its divisors is an integer number (498332104704).

Almost surely, 2^{21012220010012} is an apocalyptic number.

21012220010012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21012220010012 is an abundant number, since it is smaller than the sum of its proper divisors (26827662041572).

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

21012220010012 is a wasteful number, since it uses less digits than its factorization.

21012220010012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110679 (or 110677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21012220010012 its reverse (21001002221012), we get a palindrome (42013222231024).

The spelling of 21012220010012 in words is "twenty-one trillion, twelve billion, two hundred twenty million, ten thousand, twelve".