102120020022021 has 32 divisors (see below), whose sum is σ = 136540733779968. Its totient is φ = 67889980042560.

The previous prime is 102120020021941. The next prime is 102120020022023. The reversal of 102120020022021 is 120220020021201.

It is not a de Polignac number, because 102120020022021 - 2¹⁷ = 102120019890949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120020022023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6427890340 + ... + 6427906226.

It is an arithmetic number, because the mean of its divisors is an integer number (4266897930624).

Almost surely, 2^{102120020022021} is an apocalyptic number.

It is an amenable number.

102120020022021 is a deficient number, since it is larger than the sum of its proper divisors (34420713757947).

102120020022021 is a wasteful number, since it uses less digits than its factorization.

102120020022021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20561.

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

Adding to 102120020022021 its reverse (120220020021201), we get a palindrome (222340040043222).

The spelling of 102120020022021 in words is "one hundred two trillion, one hundred twenty billion, twenty million, twenty-two thousand, twenty-one".