101220122021021 has 4 divisors (see below), whose sum is σ = 101220592020444. Its totient is φ = 101219652021600.

The previous prime is 101220122020991. The next prime is 101220122021069. The reversal of 101220122021021 is 120120221022101.

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

It can be written as a sum of positive squares in 2 ways, for example, as 52099451820025 + 49120670200996 = 7217995^2 + 7008614^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220122021021 - 2²² = 101220117826717 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 (101220122021321) 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, 234676520 + ... + 235107441.

It is an arithmetic number, because the mean of its divisors is an integer number (25305148005111).

Almost surely, 2^{101220122021021} is an apocalyptic number.

It is an amenable number.

101220122021021 is a deficient number, since it is larger than the sum of its proper divisors (469999423).

101220122021021 is an equidigital number, since it uses as much as digits as its factorization.

101220122021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469999422.

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

Adding to 101220122021021 its reverse (120120221022101), we get a palindrome (221340343043122).

The spelling of 101220122021021 in words is "one hundred one trillion, two hundred twenty billion, one hundred twenty-two million, twenty-one thousand, twenty-one".