121222031121 has 24 divisors (see below), whose sum is σ = 188009662464. Its totient is φ = 74989595520.

The previous prime is 121222031113. The next prime is 121222031159. The reversal of 121222031121 is 121130222121.

It is not a de Polignac number, because 121222031121 - 2³ = 121222031113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121222031094 and 121222031103.

It is not an unprimeable number, because it can be changed into a prime (121222031101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5568721 + ... + 5590446.

It is an arithmetic number, because the mean of its divisors is an integer number (7833735936).

Almost surely, 2^121222031121 is an apocalyptic number.

It is an amenable number.

121222031121 is a deficient number, since it is larger than the sum of its proper divisors (66787631343).

121222031121 is a wasteful number, since it uses less digits than its factorization.

121222031121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11159261 (or 11159258 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121222031121 its reverse (121130222121), we get a palindrome (242352253242).

The spelling of 121222031121 in words is "one hundred twenty-one billion, two hundred twenty-two million, thirty-one thousand, one hundred twenty-one".