901220101011121 has 4 divisors (see below), whose sum is σ = 906960356431732. Its totient is φ = 895479845590512.

The previous prime is 901220101011103. The next prime is 901220101011179. The reversal of 901220101011121 is 121110101022109.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116186000239521 + 785034100771600 = 10778961^2 + 28018460^2 .

It is not a de Polignac number, because 901220101011121 - 2³⁵ = 901185741272753 is a prime.

It is a super-3 number, since 3×901220101011121³ (a number of 46 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 901220101011092 and 901220101011101.

It is not an unprimeable number, because it can be changed into a prime (901220101011221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2870127710070 + ... + 2870127710383.

It is an arithmetic number, because the mean of its divisors is an integer number (226740089107933).

Almost surely, 2^{901220101011121} is an apocalyptic number.

It is an amenable number.

901220101011121 is a deficient number, since it is larger than the sum of its proper divisors (5740255420611).

901220101011121 is a wasteful number, since it uses less digits than its factorization.

901220101011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5740255420610.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 901220101011121 in words is "nine hundred one trillion, two hundred twenty billion, one hundred one million, eleven thousand, one hundred twenty-one".