121000001022 has 24 divisors (see below), whose sum is σ = 262173319200. Its totient is φ = 40332310560.

The previous prime is 121000000999. The next prime is 121000001093. The reversal of 121000001022 is 220100000121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 121000000995 and 121000001013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1059354 + ... + 1168002.

It is an arithmetic number, because the mean of its divisors is an integer number (10923888300).

Almost surely, 2^121000001022 is an apocalyptic number.

121000001022 is an abundant number, since it is smaller than the sum of its proper divisors (141173318178).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121000001022 is a wasteful number, since it uses less digits than its factorization.

121000001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170528 (or 170525 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121000001022 its reverse (220100000121), we get a palindrome (341100001143).

Subtracting 121000001022 from its reverse (220100000121), we obtain a palindrome (99099999099).

The spelling of 121000001022 in words is "one hundred twenty-one billion, one thousand, twenty-two".