102200111212021 has 4 divisors (see below), whose sum is σ = 102646399907500. Its totient is φ = 101753822516544.

The previous prime is 102200111212013. The next prime is 102200111212027. The reversal of 102200111212021 is 120212111002201.

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 74041911867121 + 28158199344900 = 8604761^2 + 5306430^2 .

It is a cyclic number.

It is not a de Polignac number, because 102200111212021 - 2³ = 102200111212013 is a prime.

It is a super-2 number, since 2×102200111212021² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102200111211986 and 102200111212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102200111212027) 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, 223144347396 + ... + 223144347853.

It is an arithmetic number, because the mean of its divisors is an integer number (25661599976875).

Almost surely, 2^{102200111212021} is an apocalyptic number.

It is an amenable number.

102200111212021 is a deficient number, since it is larger than the sum of its proper divisors (446288695479).

102200111212021 is an equidigital number, since it uses as much as digits as its factorization.

102200111212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446288695478.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102200111212021 its reverse (120212111002201), we get a palindrome (222412222214222).

The spelling of 102200111212021 in words is "one hundred two trillion, two hundred billion, one hundred eleven million, two hundred twelve thousand, twenty-one".