21022001102 has 16 divisors (see below), whose sum is σ = 31771345200. Its totient is φ = 10431607680.

The previous prime is 21022001101. The next prime is 21022001153. The reversal of 21022001102 is 20110022012.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022001101) 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, 855524 + ... + 879752.

It is an arithmetic number, because the mean of its divisors is an integer number (1985709075).

Almost surely, 2^21022001102 is an apocalyptic number.

21022001102 is a deficient number, since it is larger than the sum of its proper divisors (10749344098).

21022001102 is a wasteful number, since it uses less digits than its factorization.

21022001102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27491.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 21022001102 its reverse (20110022012), we get a palindrome (41132023114).

The spelling of 21022001102 in words is "twenty-one billion, twenty-two million, one thousand, one hundred two".