121220221031 has 8 divisors (see below), whose sum is σ = 149194118304. Its totient is φ = 95910504480.

The previous prime is 121220221021. The next prime is 121220221043. The reversal of 121220221031 is 130122022121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121220221031 - 2²² = 121216026727 is a prime.

It is a super-3 number, since 3×121220221031³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220221021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666045080 + ... + 666045261.

It is an arithmetic number, because the mean of its divisors is an integer number (18649264788).

Almost surely, 2^121220221031 is an apocalyptic number.

121220221031 is a deficient number, since it is larger than the sum of its proper divisors (27973897273).

121220221031 is a wasteful number, since it uses less digits than its factorization.

121220221031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332090361.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 121220221031 its reverse (130122022121), we get a palindrome (251342243152).

The spelling of 121220221031 in words is "one hundred twenty-one billion, two hundred twenty million, two hundred twenty-one thousand, thirty-one".