101210202021 has 4 divisors (see below), whose sum is σ = 134946936032. Its totient is φ = 67473468012.

The previous prime is 101210202011. The next prime is 101210202029. The reversal of 101210202021 is 120202012101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 101210202021 - 2⁶ = 101210201957 is a prime.

It is a super-4 number, since 4×101210202021⁴ (a number of 45 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101210201988 and 101210202006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101210202029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16868367001 + ... + 16868367006.

It is an arithmetic number, because the mean of its divisors is an integer number (33736734008).

Almost surely, 2^101210202021 is an apocalyptic number.

It is an amenable number.

101210202021 is a deficient number, since it is larger than the sum of its proper divisors (33736734011).

101210202021 is an equidigital number, since it uses as much as digits as its factorization.

101210202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33736734010.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 101210202021 its reverse (120202012101), we get a palindrome (221412214122).

The spelling of 101210202021 in words is "one hundred one billion, two hundred ten million, two hundred two thousand, twenty-one".