21220100011012 has 48 divisors (see below), whose sum is σ = 43344585768960. Its totient is φ = 8900544156192.

The previous prime is 21220100011007. The next prime is 21220100011027. The reversal of 21220100011012 is 21011000102212.

It is a junction number, because it is equal to n+sod(n) for n = 21220100010983 and 21220100011001.

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, 43161189 + ... + 43650067.

It is an arithmetic number, because the mean of its divisors is an integer number (903012203520).

Almost surely, 2^{21220100011012} is an apocalyptic number.

It is an amenable number.

21220100011012 is an abundant number, since it is smaller than the sum of its proper divisors (22124485757948).

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

21220100011012 is a wasteful number, since it uses less digits than its factorization.

21220100011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521920 (or 521918 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21220100011012 its reverse (21011000102212), we get a palindrome (42231100113224).

The spelling of 21220100011012 in words is "twenty-one trillion, two hundred twenty billion, one hundred million, eleven thousand, twelve".