201220101120021 has 8 divisors (see below), whose sum is σ = 268294202148960. Its totient is φ = 134146367085552.

The previous prime is 201220101119959. The next prime is 201220101120067. The reversal of 201220101120021 is 120021101022102.

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

It is not a de Polignac number, because 201220101120021 - 2⁴² = 196822054608917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201220121120021) 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, 90466710 + ... + 92664263.

It is an arithmetic number, because the mean of its divisors is an integer number (33536775268620).

Almost surely, 2^{201220101120021} is an apocalyptic number.

It is an amenable number.

201220101120021 is a deficient number, since it is larger than the sum of its proper divisors (67074101028939).

201220101120021 is a wasteful number, since it uses less digits than its factorization.

201220101120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183497235.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201220101120021 its reverse (120021101022102), we get a palindrome (321241202142123).

The spelling of 201220101120021 in words is "two hundred one trillion, two hundred twenty billion, one hundred one million, one hundred twenty thousand, twenty-one".