102020012121021 has 32 divisors (see below), whose sum is σ = 148130513856000. Its totient is φ = 62208865027008.

The previous prime is 102020012121007. The next prime is 102020012121037. The reversal of 102020012121021 is 120121210020201.

It is not a de Polignac number, because 102020012121021 - 2¹⁰ = 102020012119997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020012121061) 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, 33345166 + ... + 36275888.

It is an arithmetic number, because the mean of its divisors is an integer number (4629078558000).

Almost surely, 2^{102020012121021} is an apocalyptic number.

It is an amenable number.

102020012121021 is a deficient number, since it is larger than the sum of its proper divisors (46110501734979).

102020012121021 is a wasteful number, since it uses less digits than its factorization.

102020012121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951833.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 102020012121021 its reverse (120121210020201), we get a palindrome (222141222141222).

The spelling of 102020012121021 in words is "one hundred two trillion, twenty billion, twelve million, one hundred twenty-one thousand, twenty-one".