21011001022 has 8 divisors (see below), whose sum is σ = 34381638072. Its totient is φ = 9550455000.

The previous prime is 21011001001. The next prime is 21011001049. The reversal of 21011001022 is 22010011012.

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

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, 477522729 + ... + 477522772.

It is an arithmetic number, because the mean of its divisors is an integer number (4297704759).

Almost surely, 2^21011001022 is an apocalyptic number.

21011001022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21011001022 is a deficient number, since it is larger than the sum of its proper divisors (13370637050).

21011001022 is a wasteful number, since it uses less digits than its factorization.

21011001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955045514.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21011001022 its reverse (22010011012), we get a palindrome (43021012034).

The spelling of 21011001022 in words is "twenty-one billion, eleven million, one thousand, twenty-two".