101221001210123 has 16 divisors (see below), whose sum is σ = 101588668140960. Its totient is φ = 100854037900800.

The previous prime is 101221001210111. The next prime is 101221001210143. The reversal of 101221001210123 is 321012100122101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 101221001210123 - 2⁴⁰ = 100121489582347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101221001210143) 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, 1609282211 + ... + 1609345107.

It is an arithmetic number, because the mean of its divisors is an integer number (6349291758810).

Almost surely, 2^{101221001210123} is an apocalyptic number.

101221001210123 is a deficient number, since it is larger than the sum of its proper divisors (367666930837).

101221001210123 is an equidigital number, since it uses as much as digits as its factorization.

101221001210123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68398.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 101221001210123 its reverse (321012100122101), we get a palindrome (422233101332224).

The spelling of 101221001210123 in words is "one hundred one trillion, two hundred twenty-one billion, one million, two hundred ten thousand, one hundred twenty-three".