1211015054 has 4 divisors (see below), whose sum is σ = 1816522584. Its totient is φ = 605507526.

The previous prime is 1211015041. The next prime is 1211015081. The reversal of 1211015054 is 4505101121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4505101121 = 971 ⋅4639651.

It is a super-2 number, since 2×1211015054² = 2933114922029245832, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302753762 + ... + 302753765.

It is an arithmetic number, because the mean of its divisors is an integer number (454130646).

Almost surely, 2^1211015054 is an apocalyptic number.

1211015054 is a deficient number, since it is larger than the sum of its proper divisors (605507530).

1211015054 is an equidigital number, since it uses as much as digits as its factorization.

1211015054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605507529.

The product of its (nonzero) digits is 200, while the sum is 20.

The square root of 1211015054 is about 34799.6415786140. The cubic root of 1211015054 is about 1065.9001269855.

Adding to 1211015054 its reverse (4505101121), we get a palindrome (5716116175).

The spelling of 1211015054 in words is "one billion, two hundred eleven million, fifteen thousand, fifty-four".