21121022021102 has 16 divisors (see below), whose sum is σ = 31717677733872. Its totient is φ = 10548469503360.

The previous prime is 21121022021059. The next prime is 21121022021117. The reversal of 21121022021102 is 20112022012112.

It is a super-2 number, since 2×21121022021102² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

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, 4606358 + ... + 7966214.

It is an arithmetic number, because the mean of its divisors is an integer number (1982354858367).

Almost surely, 2^{21121022021102} is an apocalyptic number.

21121022021102 is a deficient number, since it is larger than the sum of its proper divisors (10596655712770).

21121022021102 is a wasteful number, since it uses less digits than its factorization.

21121022021102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363443.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21121022021102 its reverse (20112022012112), we get a palindrome (41233044033214).

The spelling of 21121022021102 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, twenty-one thousand, one hundred two".