121221021120101 has 16 divisors (see below), whose sum is σ = 138630470982528. Its totient is φ = 103834628913600.

The previous prime is 121221021120091. The next prime is 121221021120107. The reversal of 121221021120101 is 101021120122121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121221021120101 is a prime.

It is a super-2 number, since 2×121221021120101² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121221021120101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221021120107) 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, 83474651 + ... + 84914423.

It is an arithmetic number, because the mean of its divisors is an integer number (8664404436408).

Almost surely, 2^{121221021120101} is an apocalyptic number.

It is an amenable number.

121221021120101 is a deficient number, since it is larger than the sum of its proper divisors (17409449862427).

121221021120101 is a wasteful number, since it uses less digits than its factorization.

121221021120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447772.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 121221021120101 its reverse (101021120122121), we get a palindrome (222242141242222).

The spelling of 121221021120101 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, one hundred twenty thousand, one hundred one".