1210121023 has 4 divisors (see below), whose sum is σ = 1213009560. Its totient is φ = 1207232488.

The previous prime is 1210121021. The next prime is 1210121051. The reversal of 1210121023 is 3201210121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3201210121 = 43 ⋅74446747.

It is a cyclic number.

It is not a de Polignac number, because 1210121023 - 2¹ = 1210121021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210120994 and 1210121012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210121021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1443640 + ... + 1444477.

It is an arithmetic number, because the mean of its divisors is an integer number (303252390).

Almost surely, 2^1210121023 is an apocalyptic number.

1210121023 is a deficient number, since it is larger than the sum of its proper divisors (2888537).

1210121023 is an equidigital number, since it uses as much as digits as its factorization.

1210121023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888536.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 1210121023 is about 34786.7938016713. The cubic root of 1210121023 is about 1065.6377624085.

Adding to 1210121023 its reverse (3201210121), we get a palindrome (4411331144).

It can be divided in two parts, 12101 and 21023, that added together give a square (33124 = 182²).

The spelling of 1210121023 in words is "one billion, two hundred ten million, one hundred twenty-one thousand, twenty-three".