21211010219973 has 24 divisors (see below), whose sum is σ = 33787923039808. Its totient is φ = 11593595642112.

The previous prime is 21211010219969. The next prime is 21211010220011. The reversal of 21211010219973 is 37991201011212.

It is not a de Polignac number, because 21211010219973 - 2² = 21211010219969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211010219923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 954665740 + ... + 954687957.

Almost surely, 2^{21211010219973} is an apocalyptic number.

21211010219973 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21211010219973 is a deficient number, since it is larger than the sum of its proper divisors (12576912819835).

21211010219973 is a wasteful number, since it uses less digits than its factorization.

21211010219973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909353753 (or 1909353730 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 39.

The spelling of 21211010219973 in words is "twenty-one trillion, two hundred eleven billion, ten million, two hundred nineteen thousand, nine hundred seventy-three".