21120101210109 has 32 divisors (see below), whose sum is σ = 31143551289984. Its totient is φ = 12623672033280.

The previous prime is 21120101210077. The next prime is 21120101210141. The reversal of 21120101210109 is 90101210102112.

It is an interprime number because it is at equal distance from previous prime (21120101210077) and next prime (21120101210141).

It is not a de Polignac number, because 21120101210109 - 2⁵ = 21120101210077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120101210809) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29218237 + ... + 29932349.

It is an arithmetic number, because the mean of its divisors is an integer number (973235977812).

Almost surely, 2^{21120101210109} is an apocalyptic number.

It is an amenable number.

21120101210109 is a deficient number, since it is larger than the sum of its proper divisors (10023450079875).

21120101210109 is a wasteful number, since it uses less digits than its factorization.

21120101210109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726477.

The product of its (nonzero) digits is 72, while the sum is 21.

The spelling of 21120101210109 in words is "twenty-one trillion, one hundred twenty billion, one hundred one million, two hundred ten thousand, one hundred nine".