121220111221030 has 64 divisors (see below), whose sum is σ = 224411462111808. Its totient is φ = 47110639080960.

The previous prime is 121220111221007. The next prime is 121220111221031. The reversal of 121220111221030 is 30122111022121.

It is a junction number, because it is equal to n+sod(n) for n = 121220111220989 and 121220111221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220111221031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 813193984 + ... + 813343036.

It is an arithmetic number, because the mean of its divisors is an integer number (3506429095497).

Almost surely, 2^{121220111221030} is an apocalyptic number.

121220111221030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121220111221030 is a deficient number, since it is larger than the sum of its proper divisors (103191350890778).

121220111221030 is a wasteful number, since it uses less digits than its factorization.

121220111221030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152201.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 121220111221030 its reverse (30122111022121), we get a palindrome (151342222243151).

The spelling of 121220111221030 in words is "one hundred twenty-one trillion, two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, thirty".