102021220031 has 2 divisors, whose sum is σ = 102021220032. Its totient is φ = 102021220030.

The previous prime is 102021219997. The next prime is 102021220061. The reversal of 102021220031 is 130022120201.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (130022120201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102021220031 - 2²² = 102017025727 is a prime.

It is a super-2 number, since 2×102021220031² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102021219988 and 102021220015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021220061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010610015 + 51010610016.

It is an arithmetic number, because the mean of its divisors is an integer number (51010610016).

Almost surely, 2^102021220031 is an apocalyptic number.

102021220031 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021220031 is an equidigital number, since it uses as much as digits as its factorization.

102021220031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 102021220031 its reverse (130022120201), we get a palindrome (232043340232).

The spelling of 102021220031 in words is "one hundred two billion, twenty-one million, two hundred twenty thousand, thirty-one".