102021111010 has 96 divisors (see below), whose sum is σ = 232331207472. Its totient is φ = 31968115200.

The previous prime is 102021110993. The next prime is 102021111029. The reversal of 102021111010 is 10111120201.

It can be written as a sum of positive squares in 8 ways, for example, as 86654285641 + 15366825369 = 294371^2 + 123963^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 564084 + ... + 722656.

Almost surely, 2^102021111010 is an apocalyptic number.

102021111010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102021111010 is an abundant number, since it is smaller than the sum of its proper divisors (130310096462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

102021111010 is a wasteful number, since it uses less digits than its factorization.

102021111010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158708 (or 158701 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 102021111010 its reverse (10111120201), we get a palindrome (112132231211).

The spelling of 102021111010 in words is "one hundred two billion, twenty-one million, one hundred eleven thousand, ten".