121101200220021 has 16 divisors (see below), whose sum is σ = 184638659303424. Its totient is φ = 69161874441264.

The previous prime is 121101200219843. The next prime is 121101200220047. The reversal of 121101200220021 is 120022002101121.

It is not a de Polignac number, because 121101200220021 - 2¹⁸ = 121101199957877 is a prime.

It is a super-2 number, since 2×121101200220021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121101200220071) 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, 1617103281 + ... + 1617178166.

It is an arithmetic number, because the mean of its divisors is an integer number (11539916206464).

Almost surely, 2^{121101200220021} is an apocalyptic number.

It is an amenable number.

121101200220021 is a deficient number, since it is larger than the sum of its proper divisors (63537459083403).

121101200220021 is a wasteful number, since it uses less digits than its factorization.

121101200220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234283240.

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

Adding to 121101200220021 its reverse (120022002101121), we get a palindrome (241123202321142).

The spelling of 121101200220021 in words is "one hundred twenty-one trillion, one hundred one billion, two hundred million, two hundred twenty thousand, twenty-one".