21201011012212 has 24 divisors (see below), whose sum is σ = 39294240604416. Its totient is φ = 9974403040128.

The previous prime is 21201011012183. The next prime is 21201011012239. The reversal of 21201011012212 is 21221011010212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39470628 + ... + 40004155.

It is an arithmetic number, because the mean of its divisors is an integer number (1637260025184).

Almost surely, 2^{21201011012212} is an apocalyptic number.

It is an amenable number.

21201011012212 is a deficient number, since it is larger than the sum of its proper divisors (18093229592204).

21201011012212 is a wasteful number, since it uses less digits than its factorization.

21201011012212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79478727 (or 79478725 counting only the distinct ones).

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

Adding to 21201011012212 its reverse (21221011010212), we get a palindrome (42422022022424).

It can be divided in two parts, 2120101 and 1012212, that added together give a palindrome (3132313).

The spelling of 21201011012212 in words is "twenty-one trillion, two hundred one billion, eleven million, twelve thousand, two hundred twelve".