1212121023 has 16 divisors (see below), whose sum is σ = 1688941056. Its totient is φ = 772490880.

The previous prime is 1212120991. The next prime is 1212121037. The reversal of 1212121023 is 3201212121.

It is not a de Polignac number, because 1212121023 - 2⁵ = 1212120991 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212120993 and 1212121011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212131023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93898 + ... + 106023.

It is an arithmetic number, because the mean of its divisors is an integer number (105558816).

Almost surely, 2^1212121023 is an apocalyptic number.

1212121023 is a deficient number, since it is larger than the sum of its proper divisors (476820033).

1212121023 is a wasteful number, since it uses less digits than its factorization.

1212121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200014.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1212121023 is about 34815.5284750928. The cubic root of 1212121023 is about 1066.2245088089.

Adding to 1212121023 its reverse (3201212121), we get a palindrome (4413333144).

The spelling of 1212121023 in words is "one billion, two hundred twelve million, one hundred twenty-one thousand, twenty-three".