201012122220021 has 24 divisors (see below), whose sum is σ = 346256906186880. Its totient is φ = 109869979846176.

The previous prime is 201012122219983. The next prime is 201012122220047. The reversal of 201012122220021 is 120022221210102.

It is a happy number.

201012122220021 is a `hidden beast` number, since 201 + 0 + 1 + 21 + 222 + 200 + 21 = 666.

It is not a de Polignac number, because 201012122220021 - 2¹⁰ = 201012122218997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201012122219976 and 201012122220003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201012122220071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69362359566 + ... + 69362362463.

It is an arithmetic number, because the mean of its divisors is an integer number (14427371091120).

Almost surely, 2^{201012122220021} is an apocalyptic number.

201012122220021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201012122220021 is a deficient number, since it is larger than the sum of its proper divisors (145244783966859).

201012122220021 is a wasteful number, since it uses less digits than its factorization.

201012122220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138724722065 (or 138724722062 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 201012122220021 its reverse (120022221210102), we get a palindrome (321034343430123).

The spelling of 201012122220021 in words is "two hundred one trillion, twelve billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".