101221001211201 has 16 divisors (see below), whose sum is σ = 142065812174400. Its totient is φ = 63928491314688.

The previous prime is 101221001211139. The next prime is 101221001211227. The reversal of 101221001211201 is 102112100122101.

It is a happy number.

It is not a de Polignac number, because 101221001211201 - 2⁷ = 101221001211073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (101221001211101) 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, 1218516 + ... + 14280293.

It is an arithmetic number, because the mean of its divisors is an integer number (8879113260900).

Almost surely, 2^{101221001211201} is an apocalyptic number.

It is an amenable number.

101221001211201 is a deficient number, since it is larger than the sum of its proper divisors (40844810963199).

101221001211201 is a wasteful number, since it uses less digits than its factorization.

101221001211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15613408.

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

Adding to 101221001211201 its reverse (102112100122101), we get a palindrome (203333101333302).

The spelling of 101221001211201 in words is "one hundred one trillion, two hundred twenty-one billion, one million, two hundred eleven thousand, two hundred one".