10202121101021 has 4 divisors (see below), whose sum is σ = 10739074843200. Its totient is φ = 9665167358844.

The previous prime is 10202121100991. The next prime is 10202121101069. The reversal of 10202121101021 is 12010112120201.

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 a cyclic number.

It is not a de Polignac number, because 10202121101021 - 2¹⁴ = 10202121084637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10202121100987 and 10202121101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10202121101521) 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, 268476871061 + ... + 268476871098.

It is an arithmetic number, because the mean of its divisors is an integer number (2684768710800).

Almost surely, 2^{10202121101021} is an apocalyptic number.

It is an amenable number.

10202121101021 is a deficient number, since it is larger than the sum of its proper divisors (536953742179).

10202121101021 is an equidigital number, since it uses as much as digits as its factorization.

10202121101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536953742178.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10202121101021 its reverse (12010112120201), we get a palindrome (22212233221222).

The spelling of 10202121101021 in words is "ten trillion, two hundred two billion, one hundred twenty-one million, one hundred one thousand, twenty-one".