21310221149 has 8 divisors (see below), whose sum is σ = 24371592960. Its totient is φ = 18253112976.

The previous prime is 21310221113. The next prime is 21310221161. The reversal of 21310221149 is 94112201312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21310221149 - 2¹² = 21310217053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21310221949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1055189 + ... + 1075194.

It is an arithmetic number, because the mean of its divisors is an integer number (3046449120).

Almost surely, 2^21310221149 is an apocalyptic number.

It is an amenable number.

21310221149 is a deficient number, since it is larger than the sum of its proper divisors (3061371811).

21310221149 is a wasteful number, since it uses less digits than its factorization.

21310221149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2131819.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 21310221149 in words is "twenty-one billion, three hundred ten million, two hundred twenty-one thousand, one hundred forty-nine".