101001211220121 has 12 divisors (see below), whose sum is σ = 136198409842992. Its totient is φ = 66577577417824.

The previous prime is 101001211220111. The next prime is 101001211220149. The reversal of 101001211220121 is 121022112100101.

It is a happy number.

It is not a de Polignac number, because 101001211220121 - 2⁶ = 101001211220057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101001211220121.

It is not an unprimeable number, because it can be changed into a prime (101001211220101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2125154271 + ... + 2125201796.

It is an arithmetic number, because the mean of its divisors is an integer number (11349867486916).

Almost surely, 2^{101001211220121} is an apocalyptic number.

It is an amenable number.

101001211220121 is a deficient number, since it is larger than the sum of its proper divisors (35197198622871).

101001211220121 is an frugal number, since it uses more digits than its factorization.

101001211220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4250356248 (or 4250356159 counting only the distinct ones).

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

Adding to 101001211220121 its reverse (121022112100101), we get a palindrome (222023323320222).

The spelling of 101001211220121 in words is "one hundred one trillion, one billion, two hundred eleven million, two hundred twenty thousand, one hundred twenty-one".