1211101023 has 16 divisors (see below), whose sum is σ = 1774281600. Its totient is φ = 728717280.

The previous prime is 1211101019. The next prime is 1211101027. The reversal of 1211101023 is 3201011121.

It is an interprime number because it is at equal distance from previous prime (1211101019) and next prime (1211101027).

It is not a de Polignac number, because 1211101023 - 2² = 1211101019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211101027) 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, 127428 + ... + 136601.

It is an arithmetic number, because the mean of its divisors is an integer number (110892600).

Almost surely, 2^1211101023 is an apocalyptic number.

1211101023 is a deficient number, since it is larger than the sum of its proper divisors (563180577).

1211101023 is a wasteful number, since it uses less digits than its factorization.

1211101023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264182.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1211101023 is about 34800.8767561968. The cubic root of 1211101023 is about 1065.9253488574.

Adding to 1211101023 its reverse (3201011121), we get a palindrome (4412112144).

The spelling of 1211101023 in words is "one billion, two hundred eleven million, one hundred one thousand, twenty-three".