21022001092 has 24 divisors (see below), whose sum is σ = 36942771096. Its totient is φ = 10466980608.

The previous prime is 21022001089. The next prime is 21022001101. The reversal of 21022001092 is 29010022012.

It can be written as a sum of positive squares in 4 ways, for example, as 16953602436 + 4068398656 = 130206^2 + 63784^2 .

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, 1673218 + ... + 1685734.

It is an arithmetic number, because the mean of its divisors is an integer number (1539282129).

Almost surely, 2^21022001092 is an apocalyptic number.

It is an amenable number.

21022001092 is a deficient number, since it is larger than the sum of its proper divisors (15920770004).

21022001092 is a wasteful number, since it uses less digits than its factorization.

21022001092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14247 (or 14245 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 21022001092 in words is "twenty-one billion, twenty-two million, one thousand, ninety-two".