21020222002 has 32 divisors (see below), whose sum is σ = 34781789952. Its totient is φ = 9466861824.

The previous prime is 21020221997. The next prime is 21020222029. The reversal of 21020222002 is 20022202012.

It is a super-3 number, since 3×21020222002³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 386293 + ... + 437335.

It is an arithmetic number, because the mean of its divisors is an integer number (1086930936).

Almost surely, 2^21020222002 is an apocalyptic number.

21020222002 is a deficient number, since it is larger than the sum of its proper divisors (13761567950).

21020222002 is a wasteful number, since it uses less digits than its factorization.

21020222002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51442.

The product of its (nonzero) digits is 64, while the sum is 13.

Adding to 21020222002 its reverse (20022202012), we get a palindrome (41042424014).

The spelling of 21020222002 in words is "twenty-one billion, twenty million, two hundred twenty-two thousand, two".