102121121001021 has 16 divisors (see below), whose sum is σ = 143658900450240. Its totient is φ = 64348595009280.

The previous prime is 102121121001019. The next prime is 102121121001101. The reversal of 102121121001021 is 120100121121201.

It is a happy number.

It is not a de Polignac number, because 102121121001021 - 2¹ = 102121121001019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102121171001021) 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, 2068795890 + ... + 2068845251.

It is an arithmetic number, because the mean of its divisors is an integer number (8978681278140).

Almost surely, 2^{102121121001021} is an apocalyptic number.

It is an amenable number.

102121121001021 is a deficient number, since it is larger than the sum of its proper divisors (41537779449219).

102121121001021 is a wasteful number, since it uses less digits than its factorization.

102121121001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4137641596.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 102121121001021 its reverse (120100121121201), we get a palindrome (222221242122222).

The spelling of 102121121001021 in words is "one hundred two trillion, one hundred twenty-one billion, one hundred twenty-one million, one thousand, twenty-one".