21221033012212 has 12 divisors (see below), whose sum is σ = 40512881205216. Its totient is φ = 9645924096440.

The previous prime is 21221033012167. The next prime is 21221033012243.

21221033012212 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21221033012212² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 241148102368 + ... + 241148102455.

It is an arithmetic number, because the mean of its divisors is an integer number (3376073433768).

Almost surely, 2^{21221033012212} is an apocalyptic number.

21221033012212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21221033012212 is a deficient number, since it is larger than the sum of its proper divisors (19291848193004).

21221033012212 is a wasteful number, since it uses less digits than its factorization.

21221033012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482296204838 (or 482296204836 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

It can be divided in two parts, 2122103 and 3012212, that added together give a palindrome (5134315).

The spelling of 21221033012212 in words is "twenty-one trillion, two hundred twenty-one billion, thirty-three million, twelve thousand, two hundred twelve".