102222111212021 has 8 divisors (see below), whose sum is σ = 108326823657624. Its totient is φ = 96127581775360.

The previous prime is 102222111211973. The next prime is 102222111212041. The reversal of 102222111212021 is 120212111222201.

It can be written as a sum of positive squares in 4 ways, for example, as 66889726960996 + 35332384251025 = 8178614^2 + 5944105^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102222111212021 - 2³⁴ = 102204931342837 is a prime.

It is a super-2 number, since 2×102222111212021² (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 = 102222111211984 and 102222111212002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102222111212041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2545731560 + ... + 2545771713.

It is an arithmetic number, because the mean of its divisors is an integer number (13540852957203).

Almost surely, 2^{102222111212021} is an apocalyptic number.

It is an amenable number.

102222111212021 is a deficient number, since it is larger than the sum of its proper divisors (6104712445603).

102222111212021 is a wasteful number, since it uses less digits than its factorization.

102222111212021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5091504471.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 102222111212021 its reverse (120212111222201), we get a palindrome (222434222434222).

The spelling of 102222111212021 in words is "one hundred two trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twelve thousand, twenty-one".