1210011121001 has 4 divisors (see below), whose sum is σ = 1211198571600. Its totient is φ = 1208823670404.

The previous prime is 1210011120991. The next prime is 1210011121019. The reversal of 1210011121001 is 1001211100121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1210011121001 - 2¹⁸ = 1210010858857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210011121201) 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, 593723771 + ... + 593725808.

It is an arithmetic number, because the mean of its divisors is an integer number (302799642900).

Almost surely, 2^{1210011121001} is an apocalyptic number.

It is an amenable number.

1210011121001 is a deficient number, since it is larger than the sum of its proper divisors (1187450599).

1210011121001 is a wasteful number, since it uses less digits than its factorization.

1210011121001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187450598.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1210011121001 its reverse (1001211100121), we get a palindrome (2211222221122).

The spelling of 1210011121001 in words is "one trillion, two hundred ten billion, eleven million, one hundred twenty-one thousand, one".