121002101220021 has 32 divisors (see below), whose sum is σ = 194111350517760. Its totient is φ = 65497213002816.

The previous prime is 121002101219981. The next prime is 121002101220047. The reversal of 121002101220021 is 120022101200121.

It is not a de Polignac number, because 121002101220021 - 2¹³ = 121002101211829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002101220061) 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, 14380266 + ... + 21184811.

It is an arithmetic number, because the mean of its divisors is an integer number (6065979703680).

Almost surely, 2^{121002101220021} is an apocalyptic number.

It is an amenable number.

121002101220021 is a deficient number, since it is larger than the sum of its proper divisors (73109249297739).

121002101220021 is a wasteful number, since it uses less digits than its factorization.

121002101220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35573633.

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

Adding to 121002101220021 its reverse (120022101200121), we get a palindrome (241024202420142).

The spelling of 121002101220021 in words is "one hundred twenty-one trillion, two billion, one hundred one million, two hundred twenty thousand, twenty-one".