121220100101021 has 8 divisors (see below), whose sum is σ = 126494237421504. Its totient is φ = 115946270962720.

The previous prime is 121220100101003. The next prime is 121220100101053. The reversal of 121220100101021 is 120101001022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121220100101021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121220100100987 and 121220100101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220100101921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76241576 + ... + 77815281.

It is an arithmetic number, because the mean of its divisors is an integer number (15811779677688).

Almost surely, 2^{121220100101021} is an apocalyptic number.

It is an amenable number.

121220100101021 is a deficient number, since it is larger than the sum of its proper divisors (5274137320483).

121220100101021 is a wasteful number, since it uses less digits than its factorization.

121220100101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154091091.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121220100101021 its reverse (120101001022121), we get a palindrome (241321101123142).

The spelling of 121220100101021 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred million, one hundred one thousand, twenty-one".