1011121201 has 4 divisors (see below), whose sum is σ = 1021132404. Its totient is φ = 1001110000.

The previous prime is 1011121171. The next prime is 1011121219. The reversal of 1011121201 is 1021211101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1021211101 = 101 ⋅10111001.

It can be written as a sum of positive squares in 2 ways, for example, as 600005025 + 411116176 = 24495^2 + 20276^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011121201 - 2¹⁷ = 1010990129 is a prime.

It is a super-2 number, since 2×1011121201² = 2044732166223364802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011121261) 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, 5005450 + ... + 5005651.

It is an arithmetic number, because the mean of its divisors is an integer number (255283101).

Almost surely, 2^1011121201 is an apocalyptic number.

It is an amenable number.

1011121201 is a deficient number, since it is larger than the sum of its proper divisors (10011203).

1011121201 is a wasteful number, since it uses less digits than its factorization.

1011121201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10011202.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1011121201 is about 31798.1320363319. The cubic root of 1011121201 is about 1003.6934089362.

Adding to 1011121201 its reverse (1021211101), we get a palindrome (2032332302).

The spelling of 1011121201 in words is "one billion, eleven million, one hundred twenty-one thousand, two hundred one".