102021221001 has 16 divisors (see below), whose sum is σ = 155650290048. Its totient is φ = 58226822400.

The previous prime is 102021220979. The next prime is 102021221021. The reversal of 102021221001 is 100122120201.

It is not a de Polignac number, because 102021221001 - 2¹³ = 102021212809 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102021221021) 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, 2941440 + ... + 2975921.

It is an arithmetic number, because the mean of its divisors is an integer number (9728143128).

Almost surely, 2^102021221001 is an apocalyptic number.

It is an amenable number.

102021221001 is a deficient number, since it is larger than the sum of its proper divisors (53629069047).

102021221001 is an equidigital number, since it uses as much as digits as its factorization.

102021221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5918192.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102021221001 its reverse (100122120201), we get a palindrome (202143341202).

The spelling of 102021221001 in words is "one hundred two billion, twenty-one million, two hundred twenty-one thousand, one".