101012122220021 has 4 divisors (see below), whose sum is σ = 101012143274700. Its totient is φ = 101012101165344.

The previous prime is 101012122220003. The next prime is 101012122220039. The reversal of 101012122220021 is 120022221210101.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (101012122220003) and next prime (101012122220039).

It can be written as a sum of positive squares in 2 ways, for example, as 87924115689796 + 13088006530225 = 9376786^2 + 3617735^2 .

It is a cyclic number.

It is not a de Polignac number, because 101012122220021 - 2¹⁴ = 101012122203637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101012122222021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 564875 + ... + 14224743.

It is an arithmetic number, because the mean of its divisors is an integer number (25253035818675).

Almost surely, 2^{101012122220021} is an apocalyptic number.

It is an amenable number.

101012122220021 is a deficient number, since it is larger than the sum of its proper divisors (21054679).

101012122220021 is an equidigital number, since it uses as much as digits as its factorization.

101012122220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21054678.

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

Adding to 101012122220021 its reverse (120022221210101), we get a palindrome (221034343430122).

The spelling of 101012122220021 in words is "one hundred one trillion, twelve billion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".