202123103221011 has 16 divisors (see below), whose sum is σ = 308002665245184. Its totient is φ = 115496832785664.

The previous prime is 202123103221003. The next prime is 202123103221021. The reversal of 202123103221011 is 110122301321202.

It is not a de Polignac number, because 202123103221011 - 2³ = 202123103221003 is a prime.

It is a super-2 number, since 2×202123103221011² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (202123103221021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85613535 + ... + 87942728.

It is an arithmetic number, because the mean of its divisors is an integer number (19250166577824).

Almost surely, 2^{202123103221011} is an apocalyptic number.

202123103221011 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

202123103221011 is a deficient number, since it is larger than the sum of its proper divisors (105879562024173).

202123103221011 is a wasteful number, since it uses less digits than its factorization.

202123103221011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173611730.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 202123103221011 its reverse (110122301321202), we get a palindrome (312245404542213).

The spelling of 202123103221011 in words is "two hundred two trillion, one hundred twenty-three billion, one hundred three million, two hundred twenty-one thousand, eleven".