21101212010022 has 64 divisors (see below), whose sum is σ = 42472003242240. Its totient is φ = 6988964621184.

The previous prime is 21101212010017. The next prime is 21101212010023. The reversal of 21101212010022 is 22001021210112.

It is a super-2 number, since 2×21101212010022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21101212009983 and 21101212010010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101212010023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1722120048 + ... + 1722132300.

It is an arithmetic number, because the mean of its divisors is an integer number (663625050660).

Almost surely, 2^{21101212010022} is an apocalyptic number.

21101212010022 is an abundant number, since it is smaller than the sum of its proper divisors (21370791232218).

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

21101212010022 is a wasteful number, since it uses less digits than its factorization.

21101212010022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15317.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21101212010022 its reverse (22001021210112), we get a palindrome (43102233220134).

The spelling of 21101212010022 in words is "twenty-one trillion, one hundred one billion, two hundred twelve million, ten thousand, twenty-two".