1201553011 has 4 divisors (see below), whose sum is σ = 1230859224. Its totient is φ = 1172246800.

The previous prime is 1201552993. The next prime is 1201553029. The reversal of 1201553011 is 1103551021.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1201552993) and next prime (1201553029).

It is a cyclic number.

It is not a de Polignac number, because 1201553011 - 2¹⁷ = 1201421939 is a prime.

It is a super-2 number, since 2×1201553011² = 2887459276486332242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1201553011.

It is not an unprimeable number, because it can be changed into a prime (1601553011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14653045 + ... + 14653126.

It is an arithmetic number, because the mean of its divisors is an integer number (307714806).

Almost surely, 2^1201553011 is an apocalyptic number.

1201553011 is a deficient number, since it is larger than the sum of its proper divisors (29306213).

1201553011 is an equidigital number, since it uses as much as digits as its factorization.

1201553011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29306212.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 1201553011 is about 34663.4246865482. The cubic root of 1201553011 is about 1063.1167939114.

The spelling of 1201553011 in words is "one billion, two hundred one million, five hundred fifty-three thousand, eleven".