102022020521 has 2 divisors, whose sum is σ = 102022020522. Its totient is φ = 102022020520.

The previous prime is 102022020511. The next prime is 102022020533. The reversal of 102022020521 is 125020220201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87589362025 + 14432658496 = 295955^2 + 120136^2 .

It is a cyclic number.

It is not a de Polignac number, because 102022020521 - 2³⁴ = 84842151337 is a prime.

It is a super-2 number, since 2×102022020521² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 102022020521.

It is not a weakly prime, because it can be changed into another prime (102022020511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51011010260 + 51011010261.

It is an arithmetic number, because the mean of its divisors is an integer number (51011010261).

Almost surely, 2^102022020521 is an apocalyptic number.

It is an amenable number.

102022020521 is a deficient number, since it is larger than the sum of its proper divisors (1).

102022020521 is an equidigital number, since it uses as much as digits as its factorization.

102022020521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 102022020521 its reverse (125020220201), we get a palindrome (227042240722).

The spelling of 102022020521 in words is "one hundred two billion, twenty-two million, twenty thousand, five hundred twenty-one".