102201421020 has 48 divisors (see below), whose sum is σ = 287602022400. Its totient is φ = 27116755776.

The previous prime is 102201421013. The next prime is 102201421027. The reversal of 102201421020 is 20124102201.

It is an interprime number because it is at equal distance from previous prime (102201421013) and next prime (102201421027).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102201421027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4267852 + ... + 4291731.

It is an arithmetic number, because the mean of its divisors is an integer number (5991708800).

Almost surely, 2^102201421020 is an apocalyptic number.

102201421020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102201421020 is an abundant number, since it is smaller than the sum of its proper divisors (185400601380).

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

102201421020 is a wasteful number, since it uses less digits than its factorization.

102201421020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8559794 (or 8559792 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102201421020 its reverse (20124102201), we get a palindrome (122325523221).

The spelling of 102201421020 in words is "one hundred two billion, two hundred one million, four hundred twenty-one thousand, twenty".