1211400272 has 40 divisors (see below), whose sum is σ = 2415782880. Its totient is φ = 588222080.

The previous prime is 1211400251. The next prime is 1211400283. The reversal of 1211400272 is 2720041121.

It is a super-3 number, since 3×1211400272³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70622 + ... + 86082.

It is an arithmetic number, because the mean of its divisors is an integer number (60394572).

Almost surely, 2^1211400272 is an apocalyptic number.

It is an amenable number.

1211400272 is a deficient number, since it is larger than the sum of its proper divisors (1204382608).

1211400272 is a wasteful number, since it uses less digits than its factorization.

1211400272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15611 (or 15605 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 1211400272 is about 34805.1759369206. The cubic root of 1211400272 is about 1066.0131342198.

Adding to 1211400272 its reverse (2720041121), we get a palindrome (3931441393).

The spelling of 1211400272 in words is "one billion, two hundred eleven million, four hundred thousand, two hundred seventy-two".